.
Information collected by Joseph Newhouse and used by permission. He wrote: “My primary source of information is Chrysler-issued specifications from the National Automotive History Collection. However, the 1962 information is absent from the NAHC archives, so I've assumed that the 1961 engines continued unchanged for 1962. The information on the 1962 413 was provided by Bob Beaudin.”
Horsepower and torque figures prior to 1972 are SAE gross (measured without any accessories connected to the engine). Horsepower and torque figures from 1972 and after are SAE net (measured with all accessories connected to the engine). See allpar’s slant six page.
The slant six was actually engineered with the Valiant in mind; the short, low hood necessitated both the slanting of the engine (to minimize vertical space) and the side-mounted water pump (to minimize length). As it happened, the slanting was a great boon to the engine, because it eased servicibility and made it possible to fit a highly efficient intake manifold. All the slant six needed, but did not get, was a fuel delivery system that truly met its needs — though a two barrel carburetor was available in some markets and, briefly, after 1976.
Engine Year(s)
AvailableCompression
RatioHorsepower @ RPM
(see note)Torque (lb-ft) @ RPM
(see note)170 1963 8.2 to 1 101 @ 4400 155 @ 2400 170 1964-1966 8.5 to 1 101 @ 4400 155 @ 2400 170 1967-1969 8.5 to 1 115 @ 4400 155 @ 2400 198 1970-1971 8.4 to 1 125 @ 4400 180 @ 2000 198 1972 8.4 to 1 100 @ 4400 160 @ 2400 198 1973 8.4 to 1 95 @ 4000 150 @ 1600 198 1974 8.4 to 1 95 @ 4000 145 @ 2000 225 1960-1962 8.5 to 1 145 @ 4000 215 @ 2800 225 1963 8.2 to 1 145 @ 4000 215 @ 2400 225 1964-1971 8.4 to 1 145 @ 4000 215 @ 2400 225 1972 8.4 to 1 110 @ 4000 185 @ 2000 225 1973 8.4 to 1 105 @ 4000 185 @ 1600 225 1974 8.4 to 1 105 @ 3600 180 @ 1600 225 1975 8.4 to 1 95 @ 3600 170 @ 1600 225 1976 8.4 to 1 100 @ 3600 170 @ 1600
Horsepower and torque figures prior to 1972 are SAE gross (measured without any accessories connected to the engine). Horsepower and torque figures from 1972 and after are SAE net (measured with all accessories connected to the engine). Not all engines were available with all cars — or even to the general public. Some comparison may be aided by considering the 1971 figures: 318 horsepower was rated both net and gross, 230 gross, 150 net.
For more information, see allpar’s pages on the 273, 318, and 360 / 340 / 383 and 413 / 361
Engine Year(s)
Compression
RatioHorsepower
(see Note)Torque (lb-ft)
(see Note)273-2 bbl 1964-1967 8.8 to 1 180 @ 4200 260 @ 1600 273-4 bbl 1965-1967 10.5 to 1 235 @ 5200 280 @ 4000 273-2 bbl 1968-1969 9.0 to 1 190 @ 4400 260 @ 2000 318-2 bbl 1960-1962 9.0 to 1 230 @ 4400 340 @ 2400 318-4 bbl 1960 9.0 to 1 255 @ 4400 345 @ 2800 318-4 bbl 1961-1962 9.0 to 1 260 @ 4400 345 @ 2800 318 1968-1969 9.2 to 1 230 @ 4400 340 @ 2400 318 1970 8.8 to 1 230 @ 4400 320 @ 2000 318 1971 8.6 to 1 230 @ 4400 320 @ 2000 318 1972 8.6 to 1 150 @ 4000 260 @ 1600 318 1973 8.6 to 1 150 @ 3600 265 @ 2000 318 1974 8.6 to 1 150 @ 4000 255 @ 2200 318 1975-1976 8.5 to 1 145 @ 4000 255 @ 1600 340 1968-1970 10.5 to 1 275 @ 5000 340 @ 3200 340 1971 10.3 to 1 275 @ 5000 340 @ 3200 340 1972 8.5 to 1 240 @ 4800 290 @ 3600 340 1973 8.5 to 1 240 @ 4800 295 @ 3600 360 1974 8.4 to 1 245 @ 4800 320 @ 3600 360 1975 8.4 to 1 230 @ 4200 300 @ 3200 360 1976 8.4 to 1 220 @ 4400 280 @ 3200 361 1960 10.0 to 1 310 @ 4800 435 @ 2800 361 1961-1962 9.0 to 1 305 @ 4800 395 @ 3000 383-Ram 1960-1962 10.0 to 1 330 @ 4800 460 @ 2800 383-Police 1961-1962 10.0 to 1 325 @ 4600 425 @ 3200 383 1967 10.0 to 1 280 @ 4200 400 @ 2400 383 1968 10.0 to 1 300 @ 4400 400 @ 2400 383 1969 10.0 to 1 330 @ 5200 410 @ 3600 413 1962 11.0 to 1 410 @ 5400 460 @ 4400
The famous 426 "Hemi" V8 engine (underrated at 425 HP) was available for 1968 Super Stock Darts, and the 440 cid V8 was a limited option in some late 1960s A-bodies as well.
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